A taxable asset purchase allows the buyer to "step up," or increase, the tax basis of the acquired assets to reflect the purchase price. An asset purchase agreement documents the terms of the sale of business assets from a seller to a buyer.Both the seller and purchaser of a group of assets that makes up a trade or business must use Form 8594 to report such a sale. A Sale of Business Assets Agreement is a contract that covers the sale and purchase of tangible and intangible assets of a business.